gonsett



May 19, 1931. R. R. GONSETT 1,806,555

MOTOR OPERATED SHEARS Filed Dec. 51, 1928 r s Sheets-Sheet 1 illin -Z3.L

INVENTOR. fist-e7- R GUNSETT I BYQ ATTORNEY 7 May 19, 1931. R. R.GONSETT 1,806,555

MOTOR OPERATED SHEARS' Filed Dec} 31. 1928 3 Sheets-Sheet 2 IN VEN TOR.Reamer/Q? Game-7T ATTORNEY y 9, 1931. R. R. 'G NSETT' 1,806,555

MOTOR OPERATED SH-EARS .5

Filed Dec. 51. 1928 5 Sheets-Sheet ,5

IQVVENTOR. EOBHET/EGMSETT. I 5 '61) @(EW ATTORNEY Patented May 19, 193i,

PATENT oi-"Pics ROBERT R. GONSETT, 0! LOS ANGELES, CALIFORNIA MOTOROPERATED SHEAR/S Application filed December 81, 1928. Serial No.329,142.

My invention relates to power operated shears for hand manipulation,particularly to such shears operated by electric motors.

' The objects of my present invention are:

i first, to provide a scissors,'shears, or cutting means of this classwhich may be easily and efliciently controlled, guided and manipulatedfor cutting purposes; second, to provide means of this class which willout smoothly and effectively either very thin or very heavy materialswhich are not ordinarily easy to cut with the ordinary scissors orshears; third, to provide a cutting means of this class whereby thecutting operation is efiected by rapid and relatively short cutting"strokes so that the cutting means maybe readily guided to out small andsharp curves and corners in the material to be cut; fourth, to providemeans of this class whereby the len h of the cuttin stroke may bevariedas esired and wher by the cutting operation may be shifted to variousportions of the cutting members so as to renew the effective cuttingedge temporarily, and also whereby the leverage of the cutting membersmay be increased or decreased as desired dependingupon the weifght ortoughness of the material to be cut; fi th, to provide structuresincorporating my invention which may be easily assembled anddisassembled and in which the various parts are readily accessible andrenewable; sixth, to provide noveladjusting means'for a cutting means ofthis class; and, seventh, to provide means of this class which is novel,simple, and economical of construction, durable, easy to operate,foolproof-in its operation, which is eflicient and which will notreadily deteriorate or get out of order.

With these and other objects in view, as will appear hereinafter, myinvention consists of certain novel features of construction,combination and arrangement of parts and portions, as will behereinafter described in detail and particularly set forth in theappended claims, reference being bad to the accompanyin drawings and tothe characters of reference t ereon which form a part of this.

' application in which;

igure 1 is a side view of my cutting means or shears in one form ofconstruction, show-' ing the same in the normal cutting position; Fig. 2is a partial fragmentary sectional and partial side view with thesectional portion taken at 22 of Fig. 3, showing certain parts andportions in elevation to facilitate the illustration; Fig. 3 is apartial sectional and "partial top edge and fragmentary view thereofwith the sectional portion taken at'3 -3 of Fig.2; Figs. 4 and 5 aretransverse sectional views thereof taken respectively through 44 and5-5.0f Fig. 2; Fig. 6 is a side view of my cutting means or shears in aslightly modified form of construction; Fig. 7 is a partial side andpartial longitudinal sectional view thereof; Fig. 8 is a fragmentary 61sectional view thereof taken through 8- 8 of Fig. 7; Fig. 9 is a sideview of my cutting means in stillanother modified form of construction;Fig. 10 is alpartial side and partial sectional view thereof with thesectional portion taken at 1010 of Fig. 11; Fig. 11 is a partial topedgeview and partial sectional View thereof, with the sectional portiontaken at 1111 of Fig. 10; Fig. 12 is a front elevational view thereof;and Fig. 13 is a sectional 1 view thereof taken through 13- 13 of Fig.Like characters of reference refer to similar parts and portionsthroughout the several 'viewsof the drawings.

Inall structures shown, my cutting means, shears, or scissors, isprovided with a handle 1 for holding the device by hand and formanipulating the same. To the forward end of the handle, is secured, bymeans of a plurality of screws 3, a casing 2. In this casing ispositioned the primary operating mechanism, and thereon is supporteddirectly or indirectly the cutting means which, as shown,

consists preferably of a pair of. co-acting cutting members.

The operating means shown in Flgs. 1,2, 3, 4 and 5 consists of anelectric motor which I consists primaril of an electromagnet 4, and anarmature 5. 'l'he electromagnet 4 extends longitudinally with respect tothe casing 2 and is positioned near the upper portion thereof, 'and'consists of an iron core 4a and a wire coil 4?), the core extendinghbeyond the opposite ends of the e oneend of coil. t e core maybe.slotted and adapted to receive in the slots, corresponding lugs atthe forward end of the handle, the In s being secured to the core byscrews 6. he opposite end of the core may be supported by and secured tothe casing 2 by a screw or screws 7. The armature5 consists of a flatiron member which is provided at one end witha laterally extending lu 5awhich is pivotall mounted on the en of the core 4a secure to the handle1 and intermediate the lateral sides of the core as shown in Figs. 2 and5. Near the free end of the armature 5 is an enlarged portion 5?) whichis adapted to be attracted b the forward end of the core 4a forperiodica ly oscillating the armature about its pivotal axis. Thearmature is positioned between the lower edge of the electromagnet andthe lower side of the casing 2. This armature is normally forced awayfrom the forward end of the core by a leaf spring 8 which is secured tothe upper side of the armature and engages the under side of the forwardportion of the core. To the underside of the armature 5 is securedanother spring 9 in opposed relation to the spring 8 which is ada ted toabsorb the shock when the free end 0 the armature is forced away fromthe forward end of the core. "It will be noted that in the enlargedportion 5?) of the armature is preferably provided a bum er 10 which isadapted to check the shoclr and the noise when the free end of thearmature is attracted by and engages the .core.

The cuttin means or elements of the structures shown 1n Figs. 1 to 5consists of a pair of shearing members 21 and 22 which are ivotallyconnected intermediate their ends y a bolt 23. The portions of thecutting members forwardl of their pivotal connection are shaped sustantially as the portions forwardly of the ivotal connection ofconventional scissors, ut are preferably shorter than scissors of equalcapacity. In this instance, the cutting member 21 is stationary, thatis, normally stationary while the device is in operation, while thecutting member 22 oscillates back and forth about its pivotal axisrelative to thecutting member 21, and the two cutting'members thuscooperating are adapted to cut material placed between the same at theirrespective cutting edges 21a and 22a. 7

- At the forward end of the casing 2, but with n the same is provideda-supporting portion 24 which, for convenienceof construction, consistsof a separate member removable from the casing 2. This support-- mgmember may be secured in position to the casing by screws 25 and 26 atthe upper and lower ends of the member 24.- and also by the screws 7.The supporting member 24 is provlded at its upper and lower ends withspaced apart supporting or bearin and 246 which are connecte ,tatingportions 24a by straps 240' which, as shown, fit against the lateralsides of the forward end of the core. In the portions 24a and 24b isrevolubly mounted a relatively large adjusting screw 27 which extendsbetween its supporting portions and also above the upper side of thecasing and terminates at its upper end in a knob 27a for rothe screw.This screw is retained in positlon by the screw 25 which extends into anannular channel 27?) in the portion of the screw extending through theportion 24a. On this screw is supported the rear end of the cuttingmember 21 which is positioned between and adapted to be adjustedupwardly and, downwardly between the supporting portions 24a and 246 bythe screw 27. The extreme inner end of the cutting member 21 may beguided by the lateral portions 240 of the supporting member 24, or thesame may be guided by a guide rod 28 extending verticallythrough theportions 24a and 246. This guide rod, as shown,,is in the form of ascrew, so as to facilitate the securing of the supporting member to thecasing and also the removal 0 the cutting member 21.

The inner end of the cutting member 22 is .pivotally connected to thefree end of the armature 5, imparting the oscillating motion of thearmature to the cutting member 22. The pivotal connection between saidmembers is effected by a slide block 29 which is provided at itsopposite lateral sides with trunnions 29a which are. pivotally mountedon furcations 50 at the extended end of the the armature to berotatedabout its pivota axis and oscillating the cutting member 22 about itsivotal axis, causing the shearing action wit the cutting member 21.During the alternation of the current, the core and armature are forcedapart by the spring 8, the armature being again attracted by the forwardend of the core when the current again passes through the coil after thealternation, thus re eating the cycle in rapid succession depen ing uponthe alternations of the alternating current.

As the supported end of the cutting member 21 is ad usted downwardly bythe screw 27, the pivotal axes of the cutting members are also lowered,forcing the cutting members together and causing the cutting action ofthe cutting members to take effect a greatfrom the remainingportionsofthe structure, the screws 25, 27 and 28 are removed in the ordernamed, permitting the cutting members to be easily removed from thesupporting means and from the sliding block 29.

The casing, the cutting members and the adjusting means may be removedfrom the remaining structureby merely removing the screws 7 and 3,leaving the electromagnet and armature supported by the handle 1.

a The handle 1 is preferably hollow and is adapted to receive at itsrear end the electric cable 30 which extends through the han- "dle to asuitable switch 31 at the forward end of the handle, the switch beingconnected in any suitable manner to the electromagnet, the connectionnot being shown.

The structure shown in Figs. 6, 7 and 8 is primarily the same as thatshown in Figs. 1 to 5, .inclusive, and described above, the

essential difference being that the connecting pivotal axes of thecutting members 21 and 22 is stationary, and that the pivot means orbolt ivotally connecting said cutting members is supported by, extendedthrough, and

secured to the forward end of the casing 2;

thus the casing 2'provides a fixed and rigid pivot for the cuttingmembers and encloses the same to'beyond their pivotal axes. The forwardend of the casing 2 is relatively small, the depth and thickness beingonly slightly larger than the corresponding dimensions of the cuttingmembers at their pivotal axes when taken together. Inthis constructionalso the handle 1 forms a greater port'i'on'of the enclosing casing forthe primary operating mechanism, and part of the casing -2'may form partof the handle.

, Since the pivotal mounting of the cutting member21 is on the casing 2,the adjusting means for the cutting members in this instance isdifferent. The cutting means here consists of an'adjustin screw 32 whichis revolubly and non-shi ably mounted near its head endin the upperportion of the casing 2 and extends with its threaded portion thereinto.The screw 32 extends through an adjusting block or member 33 which ispivotally connected at its forward side to a reduced inwardly 'orbackwardly extending portion of the cutting member 21, said pivotalconnection being also slidable to provide for variations inlength ordistance of (the "pivotal connection between said members andthe pivotalmounting-of the cutting member 21., As the adjusting member 33 is forceddownwardly, the cutting portion of the cutting member 21 is forcedupwardly extending the effective cutting portions of the cutting memberstoward their outer ends and also lengthening their cutting strokes. Theupward adjustment of the adjusting member 33 produces the oppositeeffect.'

' In the structure shown in Figs. 6, 7 and 8, the armature 5 is inteally or rigidly connected to the inner en of the cutting member 22instead of being pivotally mounted at and on the inner end of the coreof the electromagnet as in the structure described above. To thearmature 5 is also secured a spring 8, which spring is-secured to theinner side of the armature backwardly from its free end. The spring isspaced at its free end from the armature andengages normally the innerend of the core of the electromagnet and performs a function similar tothat of the springS in the structure described above.

In this construction, I have provided a positive stop for limitingthemovement of the armature 5 from the electromagnet as a result of thespring 8. This positive stop consists of a screw 34 which extendsthrough the lower side of the casing 2 with its head 34a on the insideof the casing and with its outer end threaded and slotted, as indicatedby 34b. This screw is held in certain relative positions to the casingby a locknut 35 engaging the outer side of the casing. At the under sideof the inwardly extending arm of the cutting member 22 is provideda'yieldable bumper 36 which may be made of leather or other suitablematerial which engages the head of the screw 34 when the cutting membersare separated.

Thus, it will be seen thatthe structure shown in Figs. 6, 7 and 8 isconsiderably simpler than that shown in Figs. 1 to -5, in-- mentsdescribed in connection with the structures shown in Figs. 1 to 8,inclusive, namely, the handle 1, the casing 2 secured at its rear end tothe forward end of the handle by screws 3, the electromagnet 4, thearmature 5, the retracting spring 8, the shock absorber 9, cuttingmembers 21 and 22, and an adjusting screw. In this modification,however, the

cutting member 21 is a cutting disc which is pivotally mounted on aspindle or a screw 41 which extends transversely through the frontportion of the casing, the rapidly moving or oscillating or cuttlngmember 22 bey preferably forming the two as an inte- Figs. 6, 7 and 8,or the cutting member 22 as an extension beyond the free end' of thestruc- 'ture.

ing operatively connected with the armature' 5 gral member, as in thestructure shown in tion simultaneously with the oscillation of thecutting member 22. Such rotation of the cuttin member or disc 21requires special mount ng of the electromagnet 4 and special relation ofthe core thereof to the cutting member. The relation of theelectromagnet with the rotating member 21, and the operation of thelatter, is more specifically shown, described and claimed in mycopending aplication for electromagnetic motors, filed 1n the UnitedStates Patent Ofiice, April 14, 1928, under Serial No. 269,905. I

The cutting edge of the cutting member 21 is preferably on a planepassing through the median line of the cutting device, the cuttingmember 21 extending to one side of this median plane while the cuttingmember 22 is positioned in engagement with the cutting member 21, but atthe opposite side of the median line of the cutting device, the cuttingmember .21, preferably at the side on which the cutting member 22 ispositioned, is a disc 42 which is secured to the cutting member 21. Theforward end of the core 4a of the electromagnet 4 is extended aconsiderable distance forwardly of the wire coil 46, but is cut away atone side to clear the cutting member, the

other side of the core engaging the peripheral portion of the disc 42.The forward end of the core is provided with an arcuate cut out portion40 into which a portion of the disc 42 extends; In this instance onlythe upper end or portion of the arcuate portion engages the periphery ofthe disc 42 and periodically imparts blows thereagainst, causing thedisc and therefore the cutting member 21 to be rotated small portions ofa revolution in quick succession.

In order to impart such blows against the peripheral portion of the disc42, the electromagnet is oscillatorily mounted within the casing. Suchmounting is preferably effected by securin the rear end of the core 4ato a forwardly 0 set portion 43a of the supporting spring 43, the one orlower end of which is secured to the forward end of the handle at thelower portion thereof. The supporting spring 43 is preferably L-shaped,the above described portions forming one leg, the other leg extendingforwardly from the upper end of the former. This spring also preferablyengages at the juncture of its legs, the forward end of the handle. Theforwardly extended leg, designated 43?), forms a forward end betweenguide portions 2a within the casing, as shown best in Figs. 10 and 13.

The adjustment ofthe relative movements of the cutting members in thisinstance is made by limiting or increasing the arc of oscillation of thearmature. The adjusting screw 27 is screwably mounted on a substantiallyvertical axis in the forward end of the core, the upper end of the screwextending beyond the casing, and the lower end'extending freely throughthe armature and below the same, the lower end being provided with ashoulder or nut 45 which limits the downward movment of the armature. Inthis instance, the shock absorbing spring 9 rests against the inner sideof the shoulder or nut 45 which is adjustable upwardly and downwardly bythe screw. The bumper 10 in this modification is positioned around thescrew but spaced therefrom and is adapted similarly to take up the shockas the armature is attracted by the electromagnet, as in the structureshown in Figs. 1 to 5, inclusive.

Thus, as current is passed through the 'electromagnet, the cuttingmember 22 is forced upwardly; between the alternations of the electriccurrent, the armature is forced net, the latter and the armature areagain at tracted causing the cutting member 22 to be forced upwardly andthe core to impart a blow against the disc 42 causing the same to berotated slightly, thus renewing the cutting edge of the cutting member21 continuously. As the screw 27 is screwed downwardly, the arc ofoscillation of the armature is increased causing a greater blow andlonger stroke to be imparted to the cutting member 22. As the screw isadjusted upwardly, the length of the effective cutting strokes aredecreased slightly.

In this construction, the cuttin members are substantially whollyenclose but the casing is provided at its lateral sides'with V-shaped'cut away'portions 2bvpermitting the materials to be cut to be placed atand between the cutting edges of the cutting members, or similarly topermit the cutting means to be drawn through the material to be cut.

Though I have shown a particular construction, combination andarrangement of parts and portions, and certain modifications thereof, Ido not wish to be limited to this particular construction, combinationand arrangement, nor to the modifications, but desire to include in thescope of 'my invention the construction, combination and arrangementsubstantially as set forth in the apporting means, a cutting membermounted 'thereon, an electromagnet supported by saidsupporting means, anarmature in connection with said electromagnet adapted to be operatedthereby, a second cutting member positioned in operative cuttingrelation with said first cutting member and operatively connected withsaid armature, and adjusting means in connection with said first cuttingmember for varying the length of the efit'ecgive cutting stroke betweenthe cutting memers.

2. In a device of the class described, a supporting means, a cuttingmember movably mounted on said supporting means, an electrio motorsupported by said supporting means, a second cutting member shiftabllylmounted in operative cutting relation wit the first cutting member andoperatively connected to said motor and adapted to be oscillatedthereby, and means in connection with the first cutting member forvarying the length of the operative cutting stroke between said cuttingmembers.

3. In a device of the class described, a handle member, a casing securedat one end to one end of said handle member, a shearing member mountedat theopposite end of said "casing and extending forwardly therefrom, anelectromagnet positioned within said casing between said handle memberand the supported end of said shearing member, an armature pivotallymounted at one end on one end of the electromagnet and adapted to beattracted with its free end by the opposite end of said electromagnet,and a second shearing member pivotally connected intermediate its endsintermediate the ends of the first shearing member and operativelyconnected at its inner end to the free end ofsaid, armature.

4. In a device of the class described, a supporting means, a-cuttingmember mounted thereon,'a second cutting member in operative cuttingrelation with said first cutting member, operating means for actuatingsaid second cutting member relative to'the first cutting member, andadjustin means for adjusting said first cutting mem er relative to theother cutting-member whereby the effective cutting portion between saidcutting members is shifted relative to the cutting edge.

5. In a device of the classdescribed, a supporting means, a cuttingmember movably mounted on said supporting means, an electric motorsupported by said supporting means, a second cutting member shiftablythereon, an electromagnet supported by said supporting means, a secondcutting member pivotally connected intermediate its ends relative to thefirst cutting member and provided at one end with an extended portionrigidly secured thereto serving as an armature and positioned inoperative relation with respect to the electromagnet and adapted tobeperiodically attracted thereby.

7-. Ina device of the class described, a supporting means, a cuttingmember, having a pivot means intermediate its ends, mounted thereon, asecond cutting member pivotally mounted intermediate its ends relativeto the first cutting member, means for adjustin the position of thefirst cutting member, an means within the supporting means for actuating the second cutting member relative to the first cutting member,

8. In a device of the class described, means at the latter end foradjusting and holding the pivotal positionof the cutting member; asupporting casing, a cutting member. pivotally mounted intermediate itsends at one end of the casing and extending with one end therefrom, asecond cutting member pivotally mounted intermediate its ends on thecasing at the pivotal axis of the first cutting member, and. anelectromagnet mounted within the casing at the inner end of the secondcutting member and adapted periodically to oscillate the second cuttingmember.

9. In a device of the class described, a supporting casing, a cuttingmember pivotally mounted intermediate its ends at one end of at thepivotal axis of the first'cuttin member an electromagnet mounted wit inthe casing at the inner end of the second cutting member and adaptedperiodically to attract the inner endof the second cutting member,

sprin means between the inner'end of the secon cutting member and theelectromagnet for normally separating the same from each other, and ayieldable stop member within the casing adapted to be engaged bythesecond cutting member. intermediate its pivotal axis and its inner end.

- 10. In a device of the class described, a l

' supporting casing, a cutting member pivotally mounted intermediate itsends at one end of the casing and extending with one end therefrom, asecond cutting member pivotally mounted intermediate its end on theeasing at the pivotal axis of the first cutting member, an electromagnetmounted withinlaothe casing at the inner end of the second cuttingmember and adapted periodically to attract the inner end of the secondcutting member, an adj ustin screw mounted within the casing and extening with one end therefrom, and a nut mounted on the adjusting screw andpivotally connected with the inner end of the first cutting member.

11; In a device of the class described, a

supporting casing, a cutting member pivotally mounted intermediate itsends at one end of the casing and extending with one end therefrom, asecond cutting member piyotally mounted intermediate its ends on saidcasing 15 at the pivotal axis of the first cutting member, anelectromagnet mounted within the casing, an armature in connection withthe second cutting member adapted to be attracted by said electromagnet,an adjusting screw mounted within the casing and extending with one endtherefrom, and a nut mounted on the adjusting screw and pivotallyconnected with the inner 'end of the first cutting member.

45 12. In a device of the class described, a supporting means, a cuttingmember movably mounted on said supporting means, an electric motorsupported by said supporting means, a second cutting member shiftably.

mounted in operative cutting relation with the first cutting member andoperatively connected to said motor, there being provided at one end ofthe first cutting member an adjusting screw socket, and an adjustingscrew mounted on the supporting means and extending with one endtherefrom and with its opposite end into said socket for adjusting theposition of the first cutting member rela-' tive to the second cuttingmember.

40 13. In a device of the class described, a

supporting means, a cutting member mounted on the supportin means andextending with one end there mm, a second cutting member pivotallymounted intermediate its ends on the forward end of the supportingmeans, an electro-magnet mounted on the supporting means at the innerend of the second cutting member, an armature in operative relation withthe second cuttin member and positioned at one side of the electro-magnet, and a spring positioned between the side of theelectro-magnet and the armature for normally separating the armaturefrom the elec tro-magnet. V

In testimony whereof, I have hereunto set my handat Los Angeles,California this 30th day of November 1928.

5 ROBERT R. GONSETT.

CERTIFICATE or CORRECTION,

e Patent No; 1,806,555. Q Granted May 19, 1931, to

ROBERT R, GONSE'IT;

It is hereby certified that error appears: inthe printed-specificationof the a above numbered patent requiring correction as '.follows: Page5, line 92,- claim 8, beginning with the word "means" strike outall toand including the word and semi-colon "member; same page and claim, line98,'after "therefrom,"

insert means atthe latter end for adjusting and holding the pivotalposition of the cutting member,; and that the saidLetters Patent-shouldbe read with these corrections therein that the same m conform to .therecord of the case in the Patent Office. A Signed and sealed this-1stday of March, A. D. 1932.

M. J. Moore,

1 (S l) 7 a Acting (ionmisaioner otl'atento.

